展开 sqrt(3)(2-sqrt(2))

解答

展开

3 (2 - 2)

23 - 6

十进制

1.01461 \dots

求解步骤

3 (2 - 2)

使用分配律:

a (b - c) = ab - a c

3 (2 - 2) = 3 \cdot 2 - 32

= 3 \cdot 2 - 32

3 \cdot 2 - 32 = 23 - 6

= 23 - 6

e x p an d (x + 3 x) (x - 1)^{3}

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s im pl i f y (x - 1 + 3) (x + 1 + 3)

e x p an d \frac{( ( n + 1 ) ^{2} \cdot ( n + 2 ) ^{2} )}{4}

e x p an d δ (n) \cdot x (n - 1)